不需要2次 setContentView(tv); public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView tv=new TextView(this);
setContentView(tv);
Thread t=new Thread();
t.start();
try {
tv.setText("hello");
Thread.sleep(5000);
tv.setText("world");
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
t=null;
}试试
super.onCreate(savedInstanceState);
TextView tv=new TextView(this);
setContentView(tv);
Thread t=new Thread();
t.start();
try {
tv.setText("hello");
Thread.sleep(5000);
tv.setText("world");
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
t=null;
}试试
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货